A Robust Coverless Image Steganography Algorithm Based on Image Retrieval with SURF Features

Table 2

The performance of existing coverless image steganography algorithms in terms of capacity, robustness, and security.

Algorithm	Capacity	Robustness to various image attacks	Security problem
LDA_DCT [18]	Lower	Lower	Requires transmitting the image blocks’ positions, and repeatedly transmitting the same image
DenseNet_DWT [19]	Lower	Lower	Requires transmitting the image blocks’ positions, and repeatedly transmitting the same image
Faster-RCNN [35]	High	Moderate	Requires sharing the same feature extracting networks, and repeatedly transmitting the same image
DCMH-CNN [32]	High	High	Requires sharing the same feature extracting networks, cluster center K, and repeatedly transmitting the same image
The proposed method	High	High	No any additional information
			No repeatedly transmitting the same image